JPH0612864Y2 - Tilting injection valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) The present invention relates to the engagement between a part of the valve hakama forming the base of the valve stem and the elastic gasket which is the valve body by operating the push button to tilt the valve stem. This is related to the tilting injection valve device in which the liquid in the container is injected through the valve stem by the valve opening action that opens the gap between the elastic gasket and the rest of the valve hakama at the joint point. It is an object of the present invention to provide a means for an injection valve in which the valve opening response to operation is sensitive and the valve opening / closing action is reliable.

A tilting injection valve device in which the injection valve is opened by tilting the valve stem by pressing the push button obliquely or laterally is disclosed in, for example, Japanese Utility Model Publication No. 63-149261 and is well known from old times. ing. Further, in these tilting injection valve devices, a sealing ring is provided in a protruding manner on the annular top surface of the valve stem of the valve stem. This sealing ring is pressed against the elastic gasket by the valve spring that elastically supports the valve stem, and therefore the sealing portion between the valve chamber and the injection passage in the valve stem of the valve stem is pressed by the pressure contact surface between the sealing ring and the elastic gasket. It has been formed.

When the valve stem is tilted forward, for example, by operating the push button, the engaging portion between the rear end of the sealing ring and the elastic gasket tilts as a fulcrum of the lever and tilts. The front end comes off the elastic gasket,
Thus, by releasing the seal between the valve chamber and the injection passage, the valve is opened and the injection is performed.

In the conventional tilt-type injection valve device, the above-mentioned Jitsuko Sho 63-
As can be seen from Japanese Patent No. 149261, the diameter of the sealing ring is designed to be as large as possible corresponding to the inner diameter of the valve housing, and the peak of the sealing ring is designed to be blunt. The reason is that when the lever is formed, if the sealing ring is close to the rim of the valve casing, the elastic gasket strongly fixed by the rim is pressed against the sealing ring. However, there are few depressions due to the pressing force, and therefore the lever fulcrum at the time of tilting is relatively strong.
This is because the separating action of the sealing ring with respect to the elastic gasket is sensitive, and therefore the responsiveness of the valve opening to the valve opening operation can be maintained well. If the diameter of the sealing ring is set to a small diameter, the portion of the elastic gasket corresponding to the sealing ring is much more flexible than the outer peripheral portion that is strongly fixed by the rim of the valve casing, so that the tilting The fulcrum position of the lever gradually fluctuates as it progresses, and the valve opening operation slows down significantly. That is, the responsiveness of the valve opening operation to the valve opening operation is extremely deteriorated.

On the other hand, if the shape of the sealing ring is made sharp instead of being blunt, the pressure of the sealing ring due to tilting will cause the ring to bite into the elastic gasket. Similarly, the responsiveness deteriorates.

For this reason, in the conventional tilting injection valve device, the diameter of the sealing ring is made to substantially correspond to the inner diameter of the valve casing, and the shape of the peak is also blunt.

In this way, the conventional tilting injection valve device as described above maintains good responsiveness of the valve opening to the push button operation, while at the time of closing the valve, there is often liquid leakage from the injection port or no use. It is often pointed out that there is uncertainty in the valve closing action, such as a drop in the injection performance due to a slight amount of gas leakage during the operation. The reason why the valve closing action is uncertain is that the circumference of the sealing part is inevitably increased by setting the sealing ring to a large diameter, while the ridge of the sealing ring is made blunt. This is because weakening of the local pressure contact force is unavoidable.

That is, in the conventional tilt-type injection valve device, there is a trade-off relationship between the responsiveness of the valve opening to the injection operation and the qualification of the valve sealing force when the valve is opened.

Therefore, the present invention overcomes the above-mentioned trade-off relationship in the conventional tilt-type injection valve device, and provides a means that can be satisfied based on the reliable valve sealing property and the good valve opening response to the operation. It is the one we are trying to provide.

(Structure of the Invention) Hereinafter, the invention will be described with reference to the illustrated embodiment. The tilting injection valve device according to the invention is a tubular valve casing supported by the turret portion 11 of the mountain cap 1 as in the conventional case. 2, an annular top wall 12 of the turret portion, an annular elastic gasket 3 inserted and fixed between the rim of the valve casing 2, and a valve stem described below. The valve stem has a large-diameter valve stem 52 protruding from the base of a small-diameter valve stem 51 having an injection passage 53 that forms an intake port at the bottom, and a valve stem 51 on the annular top surface of the valve stem 52. A concentric sealing ring 55 is provided in a protruding manner. Then, as in the conventional case, the valve stem 51 is tightly inserted into the elastic gasket 3 and the valve hak 52 is elastically supported to press the sealing ring 55 against the elastic gasket, and the downward facing shelf surface 54 opened in the valve stem 51. The inner peripheral portion of the elastic gasket 3 is engaged with.

Further, according to this invention, the fulcrum forming ring 56 is provided so as to project on the outer periphery of the sealing ring 55 on the top surface of the valve hull 52. The diameter of the sealing ring 55 corresponds to the outer diameter of the valve stem 51, and the diameter of the fulcrum forming ring 56 is set to correspond to the inner diameter of the valve housing 2.

The present invention has been described above, but the embodiment shown in the drawings will be described below. That is, the first shown in FIG.
In the embodiment, the valve stem 51 is a hollow cylinder that is connected by being inserted into the push button 4, and the vertical groove 53a is formed in the cylindrical center pin 59 of the valve hakama 52 that is inserted into this cylinder.
The injection passage 53 is formed by (see FIG. 3).
A gap is provided between the cylindrical peripheral surface of the base of the valve stem 51 and the bottom and peripheral surfaces of the recess of the valve hak 52, and this gap forms a guide passage 57 for opening the injection passage 53 into the valve chamber. Is forming. A variety of combinations of the central pin 59 and the valve stem 51 are possible. For example, the valve stem 51 shown in FIG. 4 has a shaft hole with a hexagonal cross section. In contrast, the center pin 59 described above may be a simple cylinder, in which case the gap between each corner of the hexagon and the cylinder forms the injection passage 53. Fig. 5 shows the hexagonal prism center pin 5
A valve hakama 52 with 9 is shown. For such a central pin 59 of a hexagonal prism, the valve stem 51 may be a simple cylinder as in the case of FIG.

According to the second embodiment shown in FIG. 6, the valve stem 51 is a short cylinder integrally molded with the push button 4, and a shaft hole penetrated through the push button 4 and the valve stem 51 is used for convenience of molding work. On the other hand, a blind lid 42 is provided. In this case, it goes without saying that the shaft hole forms the injection passage 53. This second
According to the embodiment, the valve hakama 52 is cup-shaped, and the cross groove 57a (see FIG. 7) is bored through the cylindrical peripheral surface and the bottom surface of the recess, which groove can be seen from FIG. When the valve stem 51 is fitted into the valve hak 52, a guide passage 57 for opening the injection passage 53 into the valve chamber is formed.

As can be seen from FIGS. 1 and 6, through the first and second embodiments, the stem of the sealing ring 55 formed on the valve hakama 52 is formed at an acute angle so as to bite into the elastic gasket well. Has been done. On the other hand, the stalk of the fulcrum forming ring 56 is formed so as to have a blunt shape or a flat top surface in order to suppress the fluctuation of the position of the lever fulcrum when the valve stem is tilted.

Since the present invention is constructed as described above, when the injection device is not used, the sealing ring 55 provided on the top surface of the valve stem 52 of the valve stem is pressed against the elastic gasket 3 and the valve chamber and the valve chamber are provided between them. A sealing portion between the valve stem injection passages 53 is formed. According to the present invention, since the diameter of the sealing ring 55 substantially corresponds to the outer diameter of the valve stem 51, which is a small diameter, the circumference of the peak of the sealing ring 55 is extremely short, and therefore, the same elastic support force for the valve stem is obtained. On the other hand, the pressure contact force per unit contact area between the sealing ring 55 and the elastic gasket 3 is very strong, and as a result, liquid leakage or gas leakage is unlikely to occur at the sealing portion. In addition, as described below, this sealing ring 5
No. 5 does not need to be involved in the formation of the fulcrum of the lever when the valve stem is tilted, so that it is possible to form the ridge of the ring in an acute angle shape as shown in the above-mentioned embodiment, thereby making the ring into an elastic gasket. It is possible to make it bite and further enhance the sealing force of the sealing portion.

Further, according to this invention, a fulcrum forming ring 56, which is concentric with the sealing ring 55, is provided on the top surface of the valve hakker 52, and the diameter of the fulcrum forming ring 56 is the inner diameter of the valve casing 2. Therefore, when the valve stem is tilted by the operation of the push button, the mine of the fulcrum forming ring 56 engages with the elastic gasket 3 in the vicinity of the peripheral edge of the elastic gasket 3 having the highest rigidity. Form a fulcrum of lever. Therefore, after the fulcrum is formed at one end of the valve hakama 52 which is a lever due to the tilting of the valve stem, the position of this fulcrum hardly changes as the tilting of the valve stem progresses. Since the position of the fulcrum of the lever hardly changes in this way, the sealing ring 55 corresponding to the load point of the lever is used.
, That is, the portion of the sealing ring 55 located on the opposite side of the fulcrum formation point from the center of the valve hakama 52 (corresponding to the leverage point) on the diameter line passing through the fulcrum formation point of the fulcrum formation ring 56. The movement of the valve from the elastic gasket 3 almost exactly corresponds to the tilting of the valve stem. As a result, the responsiveness of the valve opening to the operation of the push button 4 is extremely good.

(Effects of the Invention) Thus, according to the present invention, it is possible to provide a tilting injection valve device that satisfies both the certainty of valve closing when the injection valve is opened and the quick and certainty response of the valve opening to the injection operation. You can

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of the first embodiment of the present invention when the valve is closed, FIG. 2 is a plan view of the valve stem of the same embodiment, FIG. 3 is a plan view of the same valve hakama, and FIG. 4 is the same. FIG. 5 is a bottom view of a valve stem showing a modified embodiment of the valve stem in the embodiment, FIG. 5 is a plan view showing a modified embodiment of the valve stem in the embodiment, and FIG. 6 is a longitudinal section when the valve is closed in the second embodiment. FIG. 7 is a plan view of the valve hakama of the same embodiment. 1 is a mountain cap, 11 is a turret part, 12 is a top wall, 2 is a valve casing, 3 is an elastic gasket, 4 is a push button, 4
1 is an injection port, 42 is a blind lid, 51 is a valve stem, 52 is a valve hakama, 5
3 is an injection passage, 53a is a vertical groove, 54 is a downward facing shelf surface, 55
Is a sealing ring, 56 is a fulcrum forming ring, 57 is a guiding groove, 57a is a cross groove, 58 is a throttle hole for ejecting liquid, 59 is a center pin, and 6 is a valve spring.

Claims (1)

[Scope of utility model registration request] 1. A tubular valve casing 2 supported by a turret portion 11 of a mountain cap 1, and an annular elastic member inserted and fixed between an annular top wall 12 of the turret portion 11 and a rim of the valve casing 2. Gasket 3 and injection passage 5 forming an intake port in the lower part
3 has a valve stem 51 having a large diameter and a valve stem having a large diameter valve hull 52 protruding from the base of the valve stem 51 and a sealing ring 55 concentric with the valve stem 51 protruding from the annular top surface of the valve stem 52. Then, the valve stem 51 is tightly inserted into the elastic gasket 3 and the valve hak 52 is elastically supported so that the sealing ring 55 is pressed against the elastic gasket 3 and the elastic gasket 3 is attached to the downward facing shelf surface 54 opened in the valve stem 51. In the device in which the inner peripheral part of is engaged,
A fulcrum forming ring 56 is provided on the outer surface of the sealing ring 55 on the top surface of the valve hakker 52 so that the diameter of the sealing ring 55 is equal to that of the valve stem 5.
Ring 5 for forming a fulcrum and corresponding to the outer diameter of 1
A tilting injection valve device in which the diameter of 6 corresponds approximately to the inner diameter of the valve housing 2.